CIDR Subnet Mask Notation

Question 1

CIDR /24

Answer 1

Subnets: 1
IPs per subnet (including network IDs & broadcast IDs): 256

Question 2

CIDR /25

Answer 2

Subnets: 2
IPs per subnet (including network IDs & broadcast IDs): 128

Question 3

CIDR /26

Answer 3

Subnets: 4
IPs per subnet (including network IDs & broadcast IDs): 64

Question 4

CIDR /27

Answer 4

Subnets: 8
IPs per subnet (including network IDs & broadcast IDs): 32

Question 5

CIDR /28

Answer 5

Subnets: 16
IPs per subnet (including network IDs & broadcast IDs): 16

Question 6

CIDR /29

Answer 6

Subnets: 32
IPs per subnet (including network IDs & broadcast IDs): 8

Question 7

CIDR /30

Answer 7

Subnets: 64
IPs per subnet (including network IDs & broadcast IDs): 4